Boring tool holder



Sept. 27, 1949. GREISINGER 301mm TOOL HOLDER 2 Sheets-Sheet 1 Filed NOV. 18, 1947 GEORGE RElS/NGE IN VEN TOR.

A TTOR/VEY Sept. 27, 1949- e. REISINGER BORING TOOL HOLDER 2 shetsfsheet 2 INVENTOR GEORGE RE/S/NGEI? Filed .Nov- 18, 1947 A TTORMEY Patented Sept. 27, 1949 BORING TOOL HGLDER GeorgelReisinger, Irondequoit, Ni. Yr.

Application November "18, 1947; Serial N0.786-,5 70

Tlie=-present invention relates to tool holdersandm'ore particulariyto tool-holders such as are: used on lathes =for supporting"boring bars.

In the ordinary lath'e; the tooIeiholdenis-acF justable rectiii'r'rearly; amtforplacing the cutting edge-of *th'e toolon -center, that is, in the horizontal planemontaining-the axis'of the workg this rectilinear" adjustment :.is irr the-vertical direction.

'Ihe-present invention has tor =its=principa1 bb= jeets the- 'provision ofa tool-holder; particularly for b'oring" bars; throngh'use of which positioning of the tool on center can be efi'ected with greater' ,ease-and greater*accuracy'and whieh can nevertheless be held securely-in anyadjusted position. 7 1

Another object *of th'e' invention -is -to provi'd atcol holder whichwiil have a greater rangemf adjustment than the conventional tool holder and --through use of wh-ieh whoringtool can be adjustedto cut bores ofan -extremely wide' ran I of diameters.

Aifurther object of the invention is to provide a-= tool holder; particularlyfor: boring tools, in i which vertical adjustment of the'toolupordown" can be effected simply and accurately-hi7 angular adjustment'of-theholdr:

Another obj ect of the invention is to provid -a teolh'oldr; particularly=iorboring tools;- which is "so constructed-that upon loosening of the bolt n I or bolts',-= which serve to seeure -the' tool in any adjusted position,- the tool -can easi1v=he adjusted manually'but will still be held-under sumcient tension toremair'rin anyposition; to-which itmay-=be=move Still further cbjects'mf-the invention-"aerate provide atool holder, for lathes, particularly for boringb ars, which willbe simple 'in"construction and compact; v

Other objects of the-invention will-be apparent hereinafter from "the-specification and from "the recital of th'eappendedclai'ms:

Iii-'the'drawings:

Fig. 1 is a plan view 'ofatool holdermadeac cording to one embodiment of thisinvention;

Fig. 2*is a, section "through-"this holder on the line2-2 of Fig. 1;

' Fig; 3 -is"-a-fragmentary= sectional view of the holdertaken on'the-line'3 3 of Fig: 2;

Fig. 4 is a sectional view simiIar'to'Fig; 2 but showing-: the securing bolt loosened slightly to permit 'angular adjustment of the tool;

Fig. 5 is 'a-sectional-view similar to Figs. 2 and" 4 "but rshowinghthe heldinggbolt'moved: to: fully re= leased position to permit inversion of the' toohr Figrfiris aaplamwiwshowing thetooi 'holder in 10 Claims. (Cl. 29 9 8) this toollholder.

Referriug' new to the: drawings andznfirst-toc Figs. 1 to '7 inclusive, 20 denotesassupportin'gzbarr whichrmay be securedrat one iendLin the conventional tool post otazlathe SOYfOEOIIQ-"Of the spindies s thereof; The freeiendiof this harisaprovidedrona one; side: withvzamrecess =or groove :21 1 which'is-rof concavescircuiar;arcuate :shapa; Mounted lunom thezb'arrm Zforqangnlanradiustment thereon-:is a: toolablocki 222 Imtherembod-iment of the-.invenitionjliustrated; this blocknhasnateonewside-3an,

arcuatelwcurved convexrbearing surface fl of complementaryzshaperto themecess;2 I and adapt-,- edrto .fit iintoitherecess "2 I .a

The- :biock- '22 hasia hblesZfiziH: it 1 adjacent its opposite side aim-which any: conventional form- 015 boringxbarflfi amayzbe isecured clamping: screws:- 2? which: thread'Eintoethe zblocln andengagethe bars. msuitable'lboringstooluT .is carried byz-the boring bar 26. V

The-block; 22 is secured-to the support 20 by;- a

bolt .30. v This: boltlis sadaptedr to passs throughat." 'holerasl rimthe bar 26am}: amarcuataslot 321:: the Y block 22'; and to: threadaatz right angles into a: cylindrieai :pirrfii which fits rsnuglyain :a :hole'sin ,thecblockZZ! Thepimii! extends parallelwto the', holeo2fi'anditocthe lengthwise: directiorrof bearing:

surface 24; The-zb'olt Z302=SBIV6S2 to :seeure-rther pin- 3 s against I movement I relative to the: block; 22.:

Hence-the pirnwliichfiswoaxialwwith surfaces 2! i 1 and-124;! ,servesras -anpivot on whichzthezblock 22' maybe :adiustedsangularlyrto move thee boring; bar; 2 c up. ior p'lown.

The-supportmpisarecessedlomthe-side opposite;

the 5 recess :21 e to? receive a 7 conventional spring.- JWa-shersFtIiat surrounds sthe bolt '3 0; This wash! er engages against the inside face of a washer 36 1 whichsis interposed betweentheisupportiandthe head-ofithe bolt;

vn'lel'lith'eibolt t3 Bi iss'ioosened slightly; as shown inifig. ktheabiock 22Amay;;be;manually adjusted-1 angularly on the support 26 to adjust the boring bar 26 and the boring tool T carried thereby vertically. The spring washer 35 then serves to apply sufficient friction pressure to hold the block 22 in any position to which it is moved. After the adjustment is completed, the bolt 36 can be tightened up again to cause the pin 34 to pull the block 22 firmly into the recess 2| of the bar and clamp the block rigidly in any adjusted position. The arcuate slot 32 in the block permits of this adjustment being made and allows of a considerable range of vertical adjustment of the tool. When the bolt 36 is loosened sufiiciently, moreover, as shown in Fig. 5, the whole block 22 can be swung through an angle of 180 to invert the block on the support. By then inverting the supporting bar 26 in the tool post of the lathe,

the boring tool T can be adjusted to a much different radial position from that which it originally occupied. With the tool holder of the pres- L ent invention, then, a wide range in diameters of bores can be cut with'the same tool without requiring any adjustment of the cross slide of the lathe.

In the construction shown, the boring bar 26 is at all times parallel to the bed of the lathe, thereby eliminating any possibility of tilt of the boring .tool, and insuring at all times cutting of a perfect and true bore in the work, without requiring that'the tool T be adjusted in the boring bar.

Fig. 5 shows the bolt 36 loosened up sufficiently to permit the block 22 and bolt 36 to be swung through the angle of 180. The inverted position of the block is shown in dotted lines and indicated at 22', 21 denoting the inverted position of the holding screws.

Figs-6 and 7' illustrate the'range of work that may be handled simply by inversion of the block 22 and support 26. In Fig. 6, 46 designates a work piece which is to be bored, and 4| is the axis of the work spindle of the lathe. Here the boring bar 26 is between the support and the work axis 4!. In Fig; 7, the block 22 has been inverted on the support 26 and the support 26 itself has been inverted, in the tool post of the lathe (not shown). In its new position, the boring bar 26 is further away-from the axis 4| of the work than the support 26, thus permitting the boring tool T to bore a hole of much larger diameter in a work piece 42 without any adjustment of the cross slide of the lathe. Further range is, of course, possible by adjustment of the cross slide.

A modified form of tool holder made according to this invention is illustrated in Figs. 8 to 10 inclusive. This embodiment of the invention is for larger work where the cuts are heavier.

In this embodiment, there is a, supporting block 56 provided instead of the supporting bar 26. This supporting block has a concave circular arcuate recess 5i in one side of it, similar to the recess 2| of bar 26. Mounted upon the block for angular adjustment thereon is a block 52. This block has a convex circular arcuate bearing surface 54 at one side complementary to recess 5| and adapted to seat therein. The block 52, like the block 22, has a hole 55 therein in which may be mounted a boring bar 26 of conventional construction to which is secured a standard boring tool T.

The block 52 is adapted to be secured in any adjusted position by a pair of bolts 66 which pass through holes 6| in the block 56 and arcuate slots 62 in the block 52 and which thread into a pin 4 64. The pin 64 fits snugly into a hole in the block 52 parallel to the hole 55 and parallel to the lengthwise direction of the bearing surface 54. The pin may serve, therefore, as a pivot for block 52. I

Interposed between the heads of the bolts 66 and the block 56 are washers 66 which are recessed on their inside faces to receive spring washers 65. These spring washers serve to hold the block 52 frictionally when the bolts 66 are loosened slightly to permit angular adjustment of the block 52. When the bolts are tightened again, the block 52 is held between block 56 and pin 64. The angular adjustment of block 52 in block 56 permits of adjusting the vertical position of the boring tool T --so that its cutting point may lie in the horizontal plane containing the axis of the work.

The block 56 is adapted to be secured to the lathe, as, for instance, to the cross slide 16 thereof as by means of a T-bolt 1| and a nut 12 that threads thereon. The T-bolt 1| passes through the block 56 between the securing bolts 66 and its head 13 engages in the T-slot '14 of the tool post; While the slots62 in the block 52 are the same size as the slots 32 in block 22, due to the use of two bolts 66 it is impossible to invert the block 52 on block 56 simplyby loosening these bolts. By loosening the nut 12, however, the block 56 can be rotated through about the axis of bolts II. This enables the boring tool to be adjusted to cut a wide range of bore diameters.

In Fig. 9, the tool and block 52 are shown in full lines in one position of their adjustment and in dotted lines at'another position of their adjustment. In this latter position the several parts are primed. The work which is to be cut, when the tool is in its full line position, is shown at 15 in full lines; and its axis is at 16. The work which is to be cut, when the tool is in dotted line position, is denoted at 15'; and its axis is at l6'. Further radial adjustment of the boring tool is, of course, possible by adjustment of the cross slide of the lathe.

In both embodiments of my-invention illustrated, it will be noted that the pin 34 or 64 acts to clamp the tool block 22 or 52 between it and the recess 2| or 5| when the securing bolt 36 or bolts 66 are tightened, and that when the bolt or bolts are loosened, the pin acts as a pivot on which the tool block may be swung. It will be understood that the recess 2| or 5| need not be complementary in shape to the bearing surface 24 or 54. It may be V-shaped or of any other suitable contour.

The use of the spring washers 35 or 65 permits accurate adjustment of the tool block 22 or 52 since these washers insure that the block will beheld with sufficient firmness during adjustment when the holdingbolts are loosened just a little. Adjustment can be made, therefore, rapidly and accurately. By providing an angular adjustment instead of a horizontal adjustment a more rigid holding means is provided. The

construction of the tool holder of the present invention enable the operator at any time to make quick-changesin tool adjustment, particularly after sharpening of a tool.

While the invention has been described particularly inconnection with a holder for boring tools, it will be understood that it may be used, also, for holding turning tools or other forms of lathe tools.

Moreover, While the inventionhas been deserlbedlinucomiection withitwo idifierentiemhodtw ments thereon; it; bee understood; that: capable-coir further. modification: iandathis-s applia eatiomisintendedatd covert-any -variatlons,--,uses,z on, adaptations; of: the=invenfiem iollewing-s in generals theeprinciplestof .theeinvenhioni and im eludinggsuch l departmes fr m zthe nr sent disclosure as come within knownonicustomarytpra a tices imthe art-.t t hich the inventions relates and which may be applied to the essential feaa turesshereinbeforecset:forth and as fall within the scope of the invention or the limits of the appended claims: V

, Having thus described invention what I claim'isz' l. A tool holder comprising a block, a pinronzwl'iiehlisaidiblockki's ph'zotable for angular adjustment on thecsupport, oneuofmthe two-,fiiist-named parts having, alrecessstlierein to receive. the other part," said.pin extending longitudinally of the recess, and 'aiheaded-jsecuring b'oltextendi'ng atan angle to the pin and passing throughaholedn the support and threading intocthe pin, said bolt when threaded/ 1D, being adapted to holdatheiblock, anyvad-jlisted position on the support.

2. A tool holder comprising a support, a tool block, a pin on which said block is pivotable for angular adjustment on the support, one of the two first-named parts having a recess therein to receive the other part, said pin extending longitudinally of the recess, a headed securing bolt extending at an angle to the pin and passing through a hole in the support and threading into the pin, said bolt, when threaded up, being adapted to hold the block in any adjusted position on the support, and a spring member interposed between the head of the bolt and the support and adapted when the bolt is slightly released, to exert resilient clamping pressure on the pin to hold the block in position on the support.

3. A tool holder comprising a tool block having a convex bearing surface, a pin mounted in the holder coaxial with said bearing surface, a support on which the block is mounted for angular adjustment about the axis of the pin, said support having a recess therein to receive the convex bearing surface of the block, and a bolt extending at an angle to the pin and passing through the support and through an arcuate slot in the block coaxial with the pin and threading into the pin, said bolt, when threaded up, being adapted to hold the block in any adjusted position on the support.

4. A tool holder comprising a tool block having a convex bearing surface, a pin mounted in the holder coaxial with said bearing surface, a support on which the block is mounted for angular adjustment about the axis of the pin, said support having a concave recess therein complementary to said bearing surface to receive said bearing surface, and a bolt extending at an angle to the pin and passing through the support and through an arcuate slot in the block and threading into the pin, said 'bolt, when threaded up, being adapted to hold the block in any adjusted position on the support.

5. A tool holder comprising a block having a bearing surface of convex profile shape at one side, a cylindrical pin mounted in the holder to extend longitudinally in the lengthwise direction of said bearing surface, a support on which the block is mounted for angular adjustment about the pin as a pivot, said support having a concave support, a tool andfwlhichiis'slflaoed.from said bearingzsurfacenae boltlthreadin zat right langle into the. pin: gfgr s curingithe pin: toatheisupport so t at the pinz'may; servexas aepivotsforrthe: lock. inrits adjustment; saidabolttwheir released; permittin adiustmentr ofvthmblookaorrthe: support: and inversion :orilt'he block about the-.boltas awpivot-and-swhen tight-tenzedr up; seryingato securei-thegblook tostheesups port inianygadiusted position.

, 7,. ,A iteclrhclder comprising; aasupport. havin a longitudinal recess of concave arcuate profile shape in one side thereof, a tool holder mounted on said support for angular adjustment thereon, said tool block having a bearing surface of convex arcuate profile shape at one side thereof adapted to seat in said recess and having a hole extending longitudinally therethrough adjacent its opposite side in which a tool may be mounted, a cylindrical pin mounted in the block between the bearing surface and hole to extend longitudinally parallel to the bearing surface and constitute a pivot for the block, and a bolt for connecting the pin to the support, said bolt threading into the pin at right angles thereto and passing through an arcuate slot in the block, said bolt, when tightened up, serving to secure the block to the support.

8. A tool holder comprisin a support having a longitudinal recess of concave arcuate profile shape in one side thereof, a tool block mounted on said support for angular adjustment thereon, said tool block having a bearing surface of convex arcuate profile shape at one side thereof adapted to seat in said recess and having a hole extending longitudinally therethrough adjacent its opposite side in which a tool may be mounted, a cylindrical pin mounted in the block between the bearing surface and hole to extend longitudinally parallel to the bearing surface and constitute a pivot for the block, and a single bolt for connecting the pin to the support, said bolt threading into the pin at right angles thereto at a point midway the length of the block and passing through an arcuate slot in the block, said bolt, when tightened up, serving to secure the block to the support and, when loosened, permitting inversion of the block.

9. A tool holder comprising a support having a longitudinal recess of concave arcuate profile shape in one side thereof, a tool block mounted on said support for angular adjustment thereon, said tool block having a bearing surface of convex arcuate profile shape at one side thereof adapted to seat in said recess and having a hole extending longitudinally therethrough adjacent its opposite side in which a tool may be mounted, a cylindrical pin mounted in the block between the bearing surface and hole to extend longitudinally parallel to the bearing surface and constitute a pivot for the block, a bolt connecting the pin to the support'said bolt threading into the pin at right angles thereto and passing through an arcuate slot in the block, said bolt, when tightened up, serving to secure the block to the support, and a spring member surrounding said bolt and interposed between the head thereof and the support and serving to hold the block resiliently in any adjusted position on the support when the bolt is loosened slightly.

10. A tool holder comprising a support having alongitudinal recess of concave arcuate profile shape in one side thereof, a tool block mounted on said support for angular adjustment thereon,

said tool block having a bearing surface of convex arcuate profile shape at one side thereof adapted to seat in said recess and having a hole extending longitudinally therethrough adjacent its opposite side in which a tool may be mounted, a cylindrical pin mounted in the block between the bearing surface and the hole to extend longitudinally parallel to the bearing surface and constitute a pivot for the block, a pair of bolts for connecting the pin to the support, said bolts threading into the pin at right angles thereto and passing through arcuate slots in the block REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 7 Date 744,725 Dangerfield Nov. 24, 1903 1,052,979 j Slavik Feb. 11, 1913 1,131,538 Mason Mar. 9, 1915 FOREIGN PATENTS Number Country Date 2,748 Great Britain Feb. 3, 1913 

